Which has had the greatest impact on preventing epidemics in the twenty-first century?

The newly created nazi ghettos were built where? in traditionally jewish neighborhoods. in rural areas. in poor urban areas. in isolated areas to prevent knowledge of the ghettos. primarily in germany.

Take another look at the population pyramid for france in 1950. notice the disparity between the male and female populations in the 55 to 70 year-old age group. what historical event could account for this disparity?

What governments allow the use of the initiative, the referendum, and the recall? a. all state governments and the federal government b. some state governments and the federal government c. some state governments d. all state governments